PDD Reactor

In 2068 George and Neal invented the PDD Reactor, a source of nearly endless energy. It converts Poopy Disposable Diapers into highly efficient energy. Unfortunately, when they invented the PDD Reactor there was no such thing as disposable diapers. So Neal and George went back to 1950 to invent the disposable diaper. By the time 2068 rolled around there was enough fuel stockpiled to run the PDD Reactor indefinitely.